Concrete Calculator for Sonotube

Last updated: 10 Nov 2025 | Author: Brij | Review By: Irshad

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Use our Concrete Calculator for Sonotube to estimate concrete volume accurately. Includes formulas, and step-by-step calculations for any sonotube size or quantity.

Diameter of Sonotube:

Height (or Depth):

Number of Sonotubes:

tubes

Sonotube Concrete Calculation Results

Volume of One Sonotube:

cu ft

Total Volume of Concrete Needed:

cu ft

Volume in Cubic Yards:

cu yd

Volume in Cubic Feet:

cu ft

Volume in Cubic Meters:

m³

Sonotubes (also called concrete form tubes) are widely used for building round concrete columns, footings, deck posts, and structural foundations. Calculating the correct amount of concrete is essential to avoid wastage and ensure project accuracy.

A Concrete Calculator for Sonotube helps you quickly estimate how much concrete you need based on the tube’s diameter, height, and quantity.

This guide explains all formulas used and includes LaTeX code for easy embedding.

Formula to Calculate Volume of One Sonotube

A Sonotube is a cylindrical shape, so the formula for cylinder volume applies:

Formula

$\text{Volume} = \pi \times r^2 \times h$

Where:

$r = \frac{\text{Diameter}}{2}$
h = Height or Depth of Sonotube

Formula to Convert Diameter to Radius

If you have diameter:

Formula

$r = \frac{d}{2}$

Total Concrete Volume for Multiple Sonotubes

Formula

$\text{Total Volume} = \text{Volume of One Tube} \times \text{Number of Tubes}$

Unit Conversion (Optional But Useful)

Convert cubic feet to cubic yards:

$\text{Cubic Yards} = \frac{\text{Cubic Feet}}{27}$

Example Calculation

Example:

You have 3 sonotubes, each with:

Diameter = 12 inches
Height = 48 inches

Step 1: Convert units

1 inch = 0.08333 ft

So:

Diameter in feet = $12 \times 0.08333 = 1$
Radius = $\frac{1}{2} = 0.5$ ft
Height in feet = $48 \times 0.08333 = 4$

Step 2: Use the cylinder volume formula

$\text{Volume} = \pi \times (0.5)^2 \times 4$

Step 3: Simplify

Volume = 3.1416 × 0.25 × 4

Volume = 0.7854 × 4

Volume = 3.1416

So volume of each tube ≈ 3.1416 cubic feet

Step 4: Multiply by number of tubes

$\text{Total Volume} = 3.1416 \times 3 = 9.4248\ \text{cubic feet}$

Step 5: Convert cubic feet to cubic yards

$\text{Cubic Yards} = \frac{9.4248}{27} \approx 0.3498$

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